ODY-02-1
TACHOMETER
Introduction:
The Odyssey gauge series from Dakota Digital, Inc. incorporates the
reliability and quality of our standard gauges, along with several unique features
and easy mounting. These features include:
• 300-9990 rpm range with 10 rpm resolution.
• Adjustable for 2, 4, 6, and 8 cylinder engines.
• Microprocessor stabilized readings.
• Night dimming with lens label lighting.
• High Visibility VFD display for sunlight readability.
The Odyssey tachometer will show the current engine speed in revolutions
per minute. The update rate is 2 times per second. The unit incorporates
stabalizing circuitry that filters out fluctuations of 25 rpm or less to prevent the
reading from constantly jumping around. The tachometer is adjustable for 2, 4,
6, and 8 cylinder gasoline engines.
Operation:
The gauge needs only the red and black wires connected to light up.
When the blue wire has 12 volts, it will dim the display to a preset level for night
viewing. The gray wire will connect to the tachometer signal.
Calibrating the tachometer:
The tachometer can be set for 2, 4, 6, or 8 cylinder engines. The
adjustment is made using the 2 programming switches on the back of the unit.
The settings are as follows:
• #1 on, #2 on 2 cylinder engine
• #1 off, #2 on 4 cylinder engine
• #1 on, #2 off 6 cylinder engine
• #1 off, #2 off 8 cylinder engine
Connecting to tach signal:
For point or pointless distributors, connect the gray wire for the tach signal
to the negative side of the coil. For GM HEI ignition systems, connect the gray
wire to the tach output on the distributor. On MSD ignition systems connect to
the tach output terminal, if a terminal is not provided, follow the instructions
included with the MSD system. With other aftermarket ignition systems, follow
the instructions provided with the ignition for a voltage, pulse sensing
tachometer. For newer vehicles which already provide a tachometer signal,
consult the service manual to determine wire color and location.
Wiring:
BLACK - connect to a good ground point in the vehicle.
RED - connect to a 12V accessory terminal for power.
BLUE - connect to the tail light circuit.
GRAY - connect to engine tachometer signal.
Mounting:
The gauge requires a rectangular cut out that is about 2 9/16“ x 1 11/16“.
It should be inserted into the opening from the front and the U-clamp will be
installed from the back. Tighten the two nuts on the U-clamp so that the gauge is
secure. Figure 2 shows the required cut out for the gauge. Figure 3 shows how
the gauge mounts.
Troubleshooting guide.
Problem Possible cause Solution
Gauge will not light up Red wire does not have Connect to a location that has power.
power.
Black wire is not getting Connect ground to a different location.
a good ground.
Fuse is blown. Replace in line fuse. (2 amp)
Gauge is damaged. Return gauge for repair. (see instructions)
Gauge lights up, but tach Gray wire is not connected Check connection from gray wire to.
will only show zero. properly. ignition signal wire.
Gauge is not calibrated Make sure the programming switches are
correctly set for the correct number of cylinders.
Tach reading is erratic or Tach signal wire is loose Check all wire connections and inspect wire
jumps around. or broken. for breaks.
Interference from other Keep tach signal wire away from spark plug
ignition wires. wires as much as possible.
Poor ground connection. Check ground connection on speedometer
and sensor.
Tach reading is incorrect. Gauge is not calibrated Gauge must be set for the number of engine
correctly. cylinders(see instructions).
Gauge will not dim. Blue wire is not connected Check wiring connections. Blue wire should
correctly. have 12 volts with headlights on.
Gauge remains dim at all Blue wire is getting power Connect blue wire to location that only
times. all of the time. has power when the headlights are on.
SERVICE AND REPAIR
DAKOTA DIGITAL offers complete service and repair of its product line. In addition,
technical consultation is available to help you work through any questions or problems you
may be having installing one of our units.
Should you ever need to send the unit back for repairs, please package the product in a good
quality box along with plenty of packing material. Ship the product by UPS or insured Parcel
Post. Be sure to include a complete description of the problem, your full name and address
(street address preferred), and a telephone number where you can be reached during the day.
An authorization number for products being returned for repair is not needed. Do not send any
money. We will bill you for the repair charges.
Technical specifications
Minimum operating voltage - 7 volts
Maximum operating voltage - 18 volts
(operating at or near maximum rating for an extended time can damage unit)
RPM range - 300-9990
RPM resolution - 10 rpm
RPM update rate - 2 times per second
Typical current draw (@ 13.8V) - 0.11 A
ODYSSEY SERIES DIGITAL GAUGE LIMITED WARRANTY
DAKOTA DIGITAL (the Company) warrants to the ORIGINAL PURCHASER of this product that should it, under
normal use and condition, be proven defective in material or workmanship within 24 MONTHS FROM THE DATE OF
PURCHASE, such defect(s) will be repaired or replaced (at the Company’s option) without charge for parts or labor
directly related to repairs of the defect(s).
To obtain repair or replacement within the terms of this Warranty, the product is to be delivered with proof of
warranty coverage (e.g. dated bill of sale), name, address, phone number, and specification of defects, transportation
prepaid, to the factory. This Warranty is valid for the original purchaser only and may not be transferred.
This warranty does not cover nor extend to damage to vehicle electrical system. This Warranty does not apply
to any product or part thereof which in the opinion of the Company has been damaged through alteration, improper
installation, mishandling, misuse, neglect, or accident.
This Warranty is in lieu of all other express warranties or liabilities. ANY IMPLIED WARRANTIES, INCLUDING
ANY IMPLIED WARRANTY OF MERCHANTABLITY, SHALL BE LIMITED TO THE DURATION OF THIS WRITTEN
WARRANTY. ANY ACTION FOR BREACH OF ANY WARRANTY HEREUNDER INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABLITY MUST BE BROUGHT WITHIN A PERIOD OF 24 MONTHS FROM DATE OF
ORIGINAL PURCHASE. IN NO CASE SHALL THE COMPANY BE LIABLE FOR ANY CONSEQUENTIAL OR
INCIDENTAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED,
WHATSOEVER. No person or representative is authorized to assume for the Company any liability other that expressed
herein in connection with the sale of this product.
The Company does not warrant that this product cannot be compromised or circumvented. THE EXTENT OF
THE COMPANY’S LIABILITY UNDER THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT PROVIDED
ABOVE AND, IN NO EVENT, SHALL THE COMPANY’S LIABILITY EXCEED THE PURCHASE PRICE PAID TO THE
PURCHASER FOR THE PRODUCT.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation if
incidental or consequential damage so the above limitations or exclusions may not apply to you. This warranty gives you
specific legal rights and you may also have other rights which vary from state to state.
4510 W. 61ST St. N., Sioux Falls, SD 57107
Phone: (605) 332-6513 FAX: (605) 339-4106
www.dakotadigital.com
©Copyright 1999 Dakota Digital Inc.
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